How can I change the size of the display?

I want to zoom in, so to speak

The size of the display is not controlled in the Can Do apps but by the zoom factor of the respective browser used. In Chrome (on the Mac), this can be done in the “Show” menu or with the shortcut ⌘+, or ⌘-. This changes the zoom factor in percentages and thus also the display in the Can Do apps.